Title of Invention	"ANIONIC SELF-CROSS-LINKABLE POLYURETHANE MATERIAL"
Abstract	A polyurethane material, the coatings prepared therefrom, and methods of making the same are provided. An anionic self-crosslinkable polyurethane material has a weight average molecular weight of less than 15,000 grams per mole and, when cured, has a toughness of at least 20 MPa according to TOUGHNESS TEST METHOD at a temperature of 25 °C.

Full Text

DESCRIPTION (COMPLETE) OCR NOT PREPARE DUE TO PRINT PROBLEM We claim: 1. An anionic self-crosslinkable polyurethane material having hydroxyl functionality, the polyurethane material having a weight average molecular weight of less than 15,000 grams per mole, wherein the polyurethane material, when cured, has a toughness of at least 20 MPa as measured by TOUGHNESS TEST METHOD at a temperature of 25° C. and wherein the polyurethane material is formed from components comprising: (a) at least one polyisocyanate of the kind such as herein described; (b) at least one active hydrogen-containing material of the kind such as herein described; (c) at least one material of the kind such as herein described having at least one primary or secondary amino group and at least one hydroxyl group; and (d) at least one acid functional material or anhydride of the kind such as herein described having a functional group reactive with isocyanate or hydroxyl groups of other components from which the polyurethane material is formed; wherein the amount of said component (a) is from 10 to 60% by wt of total resin solids employed for preparing said polyurethane material; the amount of said component (b) is in the range of from 2 to 50 % by wt; the amount of said component (c) is from 2 to 20 % by wt and the amount of said component (d) is from at least 2 % by wt. 2. The polyurethane material as claimed in claim 1, wherein the polyisocyanate is selected from the group consisting of one or more of aliphatic polyisocyanates, cycloaliphatic polyisocyanates, araliphatic polyisocyanate, and aromatic polyisocyanates. 3. The polyurethane material as claimed in claim 2, wherein the polyisocyanate is selected from the group consisting of one or more of isophorone diisocyanate, tetramethyl xylylene diisocyanate, trimethylhexamethylene diisocyanate and hexamethylene diisocyanate. 4. The polyurethane material as claimed in any preceding claim, wherein the active hydrogen-containing material is a polyol. 5. The polyurethane material as claimed in claim 4, wherein the polyol has a weight average molecular weight of less than 3000 grams per mole, preferably at least 60 grams per mole. 6. The polyurethane material as claimed in claim 4 or 5, wherein the polyol is selected from the group consisting of one or more of trimethylolpropane, ditrimethylolpropane, pentaerythritol and trimethylolethane. 7. The polyurethane material as claimed in any preceding claim, wherein the polyisocyanate and the active hydrogen-containing material are pre-reacted to form a polyisocyanate functional prepolymer prior to addition of remaining components (c) and (d) used to form the polyurethane material. 8. The polyurethane material as claimed in any preceding claim optionally comprising a polyoxyalkylene polyamine of the kind such as herein described which is different from the active hydrogen-containing material. 9. The polyurethane material as claimed in claim 8 wherin said polyoxyalkylene polyamine is selected from the group consisting of one or more of polyoxypropylene diamine and polytetramethylene glycol bis(3-aminopropyl(ether)). 10. The polyurethane material as claimed in claim 8 or 9 wherein the polyoxyalkylene polyamine is present in an amount ranging from 1 to 50 weight percent based upon the total resin solids of components from which the curable polyurethane material is formed. 11. The polyurethane material as claimed in any preceding claim wherein said component (c) is selected from the group consisting of one or more of diethanol amine, 2-amino-2-methylpropanediol and diisopropanolamine. 12. The polyurethane material as claimed in any preceding claim, wherein said component (d) is an organic compound having an acid anhydride group. 13. The polyurethane material as claimed in any preceding claim, wherein said component (d) is selected from the group consisting of hydroxy pivalic acid and trimellitic anhydride. 14. The polyurethane material as claimed in any preceding claim, wherein the components from which the polyurethane material is formed optionally comprises at least one polyoxyalkylene polyol. 15. The polyurethane material as claimed in claim 14, wherein the polyoxyalkylene polyol is selected from the group consisting of polyoxyethylene polyols and polyoxypropylene polyols. 16. The polyurethane material as claimed in claim 15, wherein the polyoxyalkylene polyol has a weight average molecular weight of less than 3000 grams per mole. 17. The polyurethane material as claimed in any preceding claim, wherein the components from which the polyurethane material is formed further comprise a blocking agent of the kind such as herein described. 18. The polyurethane material as claimed in claim 17, wherein the blocking agent is selected from the group consisting of one or more of methyl ethyl ketoxime, dimethyl pyrazole, epsilon-caprolactam, diisopropylamine, dibutylamine and di-tert-butylamine. 19. The polyurethane material as claimed in any preceding claim wherein the components from which the polyurethane material is formed optionally comprise a conventional organic solvent of the kind such as herein described. 20. The polyurethane material as claimed in any preceding claim, wherein the components from which the polyurethane material is formed optionally comprises a tertiary amine. 21. The polyurethane material as claimed in claim 20, wherein the tertiary amine is dimethylethanol amine. 22. A coating composition whenever comprising the polyurethane material as claimed in any preceding claim. 23. A composition as claimed in claim 22 wherein said composition is a primer composition and said polyurethane material is present in the primer in an amount ranging from 2 to 100 weight percent based upon the total resin solids of components from which the primer is formed.

Documents:

431-delnp-2003-abstract.pdf

431-delnp-2003-assignment.pdf

431-delnp-2003-claims.pdf

431-DELNP-2003-Correspondence-Others (05-02-2010).pdf

431-DELNP-2003-Correspondence-Others-(28-03-2011).pdf

431-delnp-2003-correspondence-others.pdf

431-delnp-2003-correspondence-po.pdf

431-delnp-2003-description (complete).pdf

431-delnp-2003-form-1.pdf

431-delnp-2003-form-18.pdf

431-delnp-2003-form-2.pdf

431-delnp-2003-form-3.pdf

431-delnp-2003-form-5.pdf

431-delnp-2003-gpa.pdf

431-delnp-2003-pct-408.pdf

431-DELNP-2003-Petition 137-(28-03-2011).pdf

431-delnp-2003-petition-137.pdf

431-delnp-2003-petition-138.pdf